SIGNATURE OF A SPIN-UP MAGNETAR FROM MULTI-BAND AFTERGLOW REBRIGHTENING OF GRB 100814A
文献类型：期刊论文
| 作者 | Yu, Y. B.1,2; Huang, Y. F.1,2; Wu, X. F.3,4,5; Xu, M.6; Geng, J. J.1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2015-06-01 |
| 卷号 | 805期号:2页码:88 |
| 关键词 | gamma-ray burst: general ISM: individual objects (GRB 100814A) ISM: jets and outflows |
| 英文摘要 | In recent years, more and more gamma-ray bursts (GRBs) with late rebrightenings in their multi-band afterglows have revealed the late-time activity of their central engines. GRB 100814A is a special case among the well-sampled events, with complex temporal and spectral evolution. The single power-law shallow decay index of the optical light curve observed by GROND between 640 s and 10 ks is alpha(opt) = 0.57 +/- 0.02, which apparently conflicts with expectations from the simple external shock model. In particular, there is remarkable rebrightening in the optical to near-infrared bands at late times, challenging the external shock model with synchrotron emission coming from the interaction of the blast wave with the surrounding interstellar medium. In this paper, we invoke a magnetar with spin evolution to explain the complex multi-band afterglow emission of GRB 100814A. The initial shallow decay phase in the optical bands and the plateau in the X-ray can be explained as being due to energy injection from a spin-down magnetar. At late times, with materials from the fall-back disk falling onto the central object of the burster, the angular momentum of the accreted materials is transferred to the magnetar, which leads to a spin up process. As a result, the magnetic dipole radiation luminosity will increase, resulting in significant rebrightening of the optical afterglow. We show that the model can well reproduce the observed multi-band afterglow emission. |
| 学科主题 | 天文和天体物理 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY BURST ; RELATIVISTIC WIND BUBBLES ; ENERGY INJECTION ; CENTRAL ENGINE ; NEUTRON-STAR ; LIGHT CURVES ; MILLISECOND PULSARS ; SWIFT OBSERVATIONS ; DYNAMICAL MODEL ; FIREBALL MODEL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000356715400003 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/14883]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing, Jiangsu, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 4.Chinese Acad Sci, Chinese Ctr Antarct Astron, Nanjing 210008, Jiangsu, Peoples R China 5.Chinese Acad Sci, Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China 6.Normal Univ, Dept Phys Jiangxi Sci & Technol, Normal 330013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Y. B.,Huang, Y. F.,Wu, X. F.,et al. SIGNATURE OF A SPIN-UP MAGNETAR FROM MULTI-BAND AFTERGLOW REBRIGHTENING OF GRB 100814A[J]. ASTROPHYSICAL JOURNAL,2015,805(2):88. |
| APA | Yu, Y. B.,Huang, Y. F.,Wu, X. F.,Xu, M.,&Geng, J. J..(2015).SIGNATURE OF A SPIN-UP MAGNETAR FROM MULTI-BAND AFTERGLOW REBRIGHTENING OF GRB 100814A.ASTROPHYSICAL JOURNAL,805(2),88. |
| MLA | Yu, Y. B.,et al."SIGNATURE OF A SPIN-UP MAGNETAR FROM MULTI-BAND AFTERGLOW REBRIGHTENING OF GRB 100814A".ASTROPHYSICAL JOURNAL 805.2(2015):88. |
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来源：紫金山天文台
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